static example test breaking

[cllns]

When I run bundle exec rake test, I get the following error:

running example ./examples/static/config.ru...rake aborted!
undefined method `[]' for nil:NilClass
/Users/sean/dev/http_router/Rakefile:99:in `block (4 levels) in <top (required)>'
(See full trace by running task with --trace)

On OS X 10.11.2, using Ruby 1.9.3-p484 and 2.1.